We have selected our top 10 book covers from the last year which feature great images from the Magnum Photos archive. The publisher of the most popular cover for 2012 will win a copy of our new Magnum Revolution book and we need you to help us decide which one is the winner.Vote for your favourite below and then re-tweet this link http://bit.ly/UJVNNx with hashtag #magnumcovers12 for your chance to win your own copy of Magnum Revolution* (http://bit.ly/10eKseB). Click on the thumbnail of each cover to see it in full size.

Magnum Photos is a photographic cooperative of great diversity and distinction owned by its photographer members. With powerful individual vision, Magnum photographers chronicle the world and interpret its peoples, events, issues and personalities.